CN112172766A

CN112172766A - Vacuum booster of automobile braking system and working method thereof

Info

Publication number: CN112172766A
Application number: CN202011170436.7A
Authority: CN
Inventors: 赵斌
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-10-28
Filing date: 2020-10-28
Publication date: 2021-01-05

Abstract

The invention relates to the technical field of automobile braking devices and discloses an automobile braking system vacuum booster and a working method thereof. This automobile brake system vacuum booster, can drive the removal of initiative push rod when stepping on brake pedal, along with the continuation removal of initiative push rod, apply the effort at brake pedal and can drive the continuation removal of limiting plate, the limiting plate can relative spacing groove continue to remove this moment, and compress spacing spring and first reset spring, when brake pedal is no longer applyed pressure, first reset spring and spacing spring can provide reverse effort and drive limiting plate automatic re-setting, and prevent the slope from appearing in its displacement, thereby realized the advantage that appears the slope when can preventing the limiting plate from reseing.

Description

Vacuum booster of automobile braking system and working method thereof

Technical Field

The invention relates to the technical field of automobile braking devices, in particular to an automobile braking system vacuum booster and a working method thereof.

Background

A vehicle brake system refers to a series of special devices that apply a certain force to certain parts of the vehicle (mainly the wheels) so as to apply a certain degree of forced braking thereto. The braking system has the following functions: the running automobile is forced to decelerate or even stop according to the requirement of a driver; stably parking a stopped vehicle under various road conditions (including on a slope); the speed of the vehicle running on the downhill is kept stable. The automobile brake system is a brake mechanism for installing a brake device in an automobile in order to technically ensure safe driving of the automobile and increase the average speed of the automobile. Generally, a vehicle brake system includes two independent sets of a service brake device and a parking brake device. Among them, the service brake device is operated by the foot of the driver, so it is also called foot brake device. The parking brake device is operated by the hand of the driver, and is also called a hand brake device.

Adopt vacuum booster to carry out the helping hand operation to braking system generally in automobile braking system, when using, can compress the initiative push rod and drive the initiative push rod and move forward when the driver steps on brake pedal generally, lie in the limiting plate and can drive the limiting plate relative slip under the promotion of initiative push rod this moment, but lie in reset spring on the initiative push rod and can drive limiting plate automatic re-setting when the driver no longer steps on brake pedal, but because this that the power that the driver applied is not necessarily the straight line has just led to the limiting plate phenomenon that the slope can appear when automatic re-setting.

Meanwhile, in a vacuum booster of an automobile, along with the continuous movement of a linear push rod, an upper diaphragm positioned inside a vacuum valve can be driven to move relatively, namely, a channel between an inner cavity and an outer cavity is opened to flow air, so that the boosting in a braking system is realized, but the stroke of the upper diaphragm is generally fixed and unchanged, so that the upper diaphragm can frequently contact with the side wall of the vacuum valve in a frequent braking process, and the deformation of the upper diaphragm can be caused by frequent contact, so that the service life is shortened.

Modern automobiles generally adopt a hydraulic mode to vibrate, brake oil is generally used for braking a valve body in the braking process, namely an oil pot is connected to one end of an oil cylinder to bear the brake oil, but the fixation between the oil pot and the oil cylinder in the existing device is complex, the disassembly is difficult, and the requirement of frequent maintenance cannot be met.

Disclosure of Invention

The invention provides a vacuum booster of an automobile braking system, which has the advantages of preventing a limiting plate from inclining when being reset, avoiding the damage of an upper diaphragm and conveniently disassembling an oil pot, and solves the problems in the background technology.

The invention provides the following technical scheme: the utility model provides an automobile brake system vacuum booster, includes the initiative push rod, the booster pump has been cup jointed in the one end activity of initiative push rod, first spacing groove has all been seted up to the left and right sides of booster pump inner chamber, the inside activity joint of first spacing groove has the limiting plate, the one end and the initiative push rod activity of limiting plate cup joint, the equal fixed mounting in the left and right sides of limiting plate bottom has spacing spring, the other end of spacing spring and the bottom fixed connection of spacing inslot chamber, the outside surface activity of initiative push rod has cup jointed the first reset spring that is located the booster pump is inside, the upper and lower both ends of first reset spring respectively with the top of booster pump inner chamber and the top fixed connection of limiting plate, the other end of initiative push rod runs through the bottom and the fixed mounting of booster pump has the connecting rod. The fixed air valve that has cup jointed of lateral surface of connecting rod, the terminal activity of connecting rod has cup jointed the vacuum valve, the lateral surface of connecting rod is fixed to be cup jointed and is located the inside last diaphragm of vacuum valve. The vacuum valve is characterized in that a limiting ring groove is formed in the bottom end of the inner cavity of the vacuum valve, a limiting sleeve is fixedly mounted in the middle of the inner cavity of the vacuum valve, an inner cavity is formed in the limiting sleeve, and an outer cavity is formed between the outer side surface of the limiting sleeve and the inner cavity of the vacuum valve. The inner diameter and the outer diameter of the limiting ring groove are the same as those of the upper diaphragm. The inlet duct has been seted up to the angle such as the bottom of vacuum valve, the end of connecting rod runs through the bottom of vacuum valve and fixed mounting has passive push rod, the fixed rubber buffer that has cup jointed of lateral surface of passive push rod, the bottom of rubber buffer contacts with the bottom of vacuum valve. The outer side surface of the driven push rod is fixedly sleeved with a lower membrane, a movable Miss on the outer side surface of the driven push rod is provided with a third return spring, and the upper end and the lower end of the third return spring are fixedly connected with the bottom end of the rubber plug and the top end of the lower membrane respectively. The bottom end of the driven push rod is movably sleeved with an oil cylinder, a piston plate located inside the oil cylinder is fixedly installed at the bottom end of the driven push rod, the diameter of the piston plate is the same as the inner diameter of the oil cylinder, the tail end of the oil cylinder is fixedly communicated with an oil pipe, and the tail end of the oil pipe is fixedly communicated with an oil pot. The oil cylinder is characterized in that fixing frames are fixedly mounted on the left side and the right side of the tail end of the oil cylinder, fixing bolts are movably mounted in the fixing frames, and the inner side faces of the fixing frames are in contact with the outer side faces of the oil pots.

Preferably, the left side and the right side of the bottom end of the inner cavity of the vacuum valve are fixedly provided with second return springs positioned on two sides of the connecting rod, and the top ends of the second return springs are fixedly connected with the bottom end of the upper diaphragm.

The invention also provides a working method of the vacuum booster of the automobile braking system, which comprises the following working steps:

the first step is as follows: firstly, fixing an active push rod and a brake pedal in a brake device, filling brake oil in an oil pot, driving the active push rod to move when a driver steps on the brake pedal, and driving a limiting plate to continuously move by acting force applied to the brake pedal along with the continuous movement of the active push rod, wherein the limiting plate can continuously move relative to a limiting groove at the moment and compress a limiting spring and a first return spring;

the second step is that: the connecting rod can drive the movement of the push rod to drive the upper diaphragm to continuously move, and at the moment, one end of the upper diaphragm is in contact with the limiting ring groove, so that the upper diaphragm is prevented from being in contact with one side of the vacuum valve, a channel between the inner cavity and the outer cavity can be opened, air can flow into the vacuum valve at the moment, and the air is guided out to the inner part of the lower diaphragm through the air inlet groove in the back of the vacuum valve to continuously apply pressure to the lower diaphragm, so that the boosting is completed, and the piston plate is driven to move to compress brake oil to complete braking;

the third step: can dismantle fixing bolt through unscrewing fixing bolt when needs are dismantled the oilcan, alright produce between two mounts this moment not hard up can take the oilcan down, and then carry out the change of brake oil to the inside of oilcan, prevent that the decline of brake oil life-span from causing the weak of braking effect.

The invention has the following beneficial effects:

1. this automobile brake system vacuum booster, there is the booster pump through the one end movable mounting at the initiative push rod, and first spacing groove has been seted up in the both sides of booster pump inner chamber, and there is the limiting plate at the inside movable mounting of first spacing groove, can drive the removal of initiative push rod when the driver through stepping on brake pedal, along with the continuation removal of initiative push rod, apply the effort at brake pedal and can drive the continuation removal of limiting plate, the limiting plate can relative spacing groove continuation removal this moment, and compress spacing spring and first reset spring, when brake pedal is no longer applyed pressure, first reset spring and spacing spring can provide reverse effort and drive limiting plate automatic re-setting, and prevent the slope from appearing in its displacement, thereby realized the problem that the slope appears when preventing the limiting plate and reseing.

2. This automobile brake system vacuum booster, through being fixed with the connecting rod in initiative push rod one end, and be equipped with the vacuum valve at the lateral surface of connecting rod, and seted up spacing annular in one side of vacuum valve, and the fixed diaphragm that has cup jointed at the lateral surface of connecting rod, the one end of going up the diaphragm this moment is just contacted with spacing annular groove along with the continuation removal of initiative push rod can drive the diaphragm when the connecting rod, avoid going up the diaphragm and contacting with one side of vacuum valve, lead to the damage of diaphragm, thereby realized can avoiding going up the problem of diaphragm damage.

3. This car braking system vacuum booster is fixed with the mount through the one end at the hydro-cylinder to be equipped with the oilcan in one side of hydro-cylinder, the one end of hydro-cylinder is fixed with the mount simultaneously, and has fixing bolt at the side movable mounting of mount, can dismantle fixing bolt through unscrewing fixing bolt when needs are dismantled the oilcan, alright produce between two mounts this moment not hard up can take down the oilcan, thereby realized the convenient dismantlement of oilcan.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of a second return spring configuration of the present invention;

FIG. 3 is a cross-sectional view of the internal structure of the present invention;

FIG. 4 is an enlarged schematic view of the structure at A in FIG. 1;

fig. 5 is an enlarged schematic view of the structure at B in fig. 3.

In the figure: 1. an active push rod; 2. a booster pump; 3. a first limit groove; 4. a limiting plate; 5. a first return spring; 6. a limiting spring; 7. an air valve; 8. a connecting rod; 9. a vacuum valve; 10. an upper diaphragm; 11. a limiting sleeve; 12. an inner cavity; 13. an outer cavity; 14. a second return spring; 15. a limiting ring groove; 16. a rubber plug; 17. a passive push rod; 18. an air inlet groove; 19. a lower diaphragm; 20. a third return spring; 21. an oil cylinder; 22. a piston plate; 23. an oil pipe; 24. an oil can; 25. a fixed mount; 26. and (5) fixing the bolt.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-5, a vacuum booster for an automobile braking system comprises a driving push rod 1, a booster pump 2 is movably sleeved at one end of the driving push rod 1, first limiting grooves 3 are formed in the left side and the right side of an inner cavity 12 of the booster pump 2, limiting plates 4 are movably clamped inside the first limiting grooves 3, one ends of the limiting plates 4 are movably sleeved with the driving push rod 1, limiting springs 6 are fixedly mounted on the left side and the right side of the bottom end of the limiting plates 4, the other ends of the limiting springs 6 are fixedly connected with the bottom end of the inner cavity 12 of the limiting grooves, a first return spring 5 located inside the booster pump 2 is movably sleeved on the outer side face of the driving push rod 1, the upper end and the lower end of the first return spring 5 are fixedly connected with the top end of the inner cavity 12 of the booster pump 2 and the top end of the limiting plates 4 respectively, and a.

Wherein, the lateral surface of connecting rod 8 is fixed to be cup jointed with air valve 7, and the end activity of connecting rod 8 is cup jointed with vacuum valve 9, and the lateral surface of connecting rod 8 is fixed to be cup jointed and is located the inside last diaphragm 10 of vacuum valve 9, and vacuum valve 9 is used for the increase of braking force, and the auxiliary increase of accessible vacuum valve 9 is exerted to arresting gear's braking force.

Wherein, the bottom of the inner chamber 12 of the vacuum valve 9 is provided with a limit ring groove 15, the middle part of the inner chamber 12 of the vacuum valve 9 is fixedly provided with a limit sleeve 11, the inner chamber 12 is arranged in the limit sleeve 11, the outer chamber 13 is arranged between the outer side surface of the limit sleeve 11 and the inner chamber 12 of the vacuum valve 9, when the upper diaphragm 10 is contacted with one side of the vacuum valve 9, a channel between the inner chamber 12 and the outer chamber 13 can be opened, and the air can flow into the inside of the vacuum valve 9 at the moment.

Wherein, the internal diameter and the external diameter of spacing ring groove 15 are the same with the internal diameter and the external diameter of last diaphragm 10, and the removal that connecting rod 8 promoted initiative push rod 1 can drive going on moving of last diaphragm 10 and one end of going up diaphragm 10 just contacts with spacing ring groove 15 this moment.

Wherein, the air inlet duct 18 has been seted up to the angle such as bottom of vacuum valve 9, and the end of connecting rod 8 runs through bottom and the fixed mounting of vacuum valve 9 has passive push rod 17, and the fixed cover of the lateral surface of passive push rod 17 has connect rubber buffer 16, and rubber buffer 16's bottom contacts with the bottom of vacuum valve 9, and rubber buffer 16 can block the bottom of vacuum valve 9 and avoid appearing last diaphragm 10 emergence leakage phenomenon.

Wherein, the left and right sides of the 12 bottoms of the inner cavity of the vacuum valve 9 are all fixedly provided with a second return spring 14 positioned at the two sides of the connecting rod 8, the top end of the second return spring 14 is fixedly connected with the bottom end of the upper diaphragm 10, and the second return spring 14 can be used for automatic reset of the upper diaphragm 10.

Wherein, the fixed cover of the lateral surface of passive push rod 17 has connect down diaphragm 19, and the lateral surface activity peacock of passive push rod 17 has third reset spring 20, and third reset spring 20's upper and lower both ends respectively with the bottom of rubber buffer 16 and the top fixed connection of diaphragm 19 down, third reset spring 20 can be used to diaphragm 19's automatic re-setting down, prevent that damage from appearing in diaphragm 19 down.

The bottom end of the driven push rod 17 is movably sleeved with an oil cylinder 21, the bottom end of the driven push rod 17 is fixedly provided with a piston plate 22 located inside the oil cylinder 21, the diameter of the piston plate 22 is the same as the inner diameter of the oil cylinder 21, the tail end of the oil cylinder 21 is fixedly communicated with an oil pipe 23, the tail end of the oil pipe 23 is fixedly communicated with an oil can 24, air is led out to the inside of the lower diaphragm 19 through an air inlet groove 18 in the back of the vacuum valve 9 to continuously apply pressure to the lower diaphragm 19, assistance is achieved, and the piston plate 22 is driven to move to compress brake oil to achieve braking.

Wherein, the equal fixed mounting in the left and right sides of hydro-cylinder 21 end has mount 25, and the equal movable mounting in inside of mount 25 has fixing bolt 26, and the medial surface of mount 25 contacts with the lateral surface of oilcan 24, can dismantle fixing bolt 26 through unscrewing fixing bolt 26 when needs are dismantled oilcan 24, alright produce between two mounts 25 at this moment and become flexible and can take off oilcan 24, and then brake the change of oil to the inside of oilcan 24.

The vacuum booster of the automobile braking system comprises the following working steps:

the first step is as follows: firstly, fixing the driving push rod 1 and a brake pedal in a brake device, filling brake oil in an oil can 24, driving the driving push rod 1 to move when a driver steps on the brake pedal, driving the limiting plate 4 to continuously move by acting force applied to the brake pedal along with the continuous movement of the driving push rod 1, enabling the limiting plate 4 to continuously move relative to the limiting groove at the moment, compressing the limiting spring 6 and the first return spring 5, and enabling the first return spring 5 and the limiting spring 6 to provide reverse acting force to drive the limiting plate 4 to automatically reset when the brake pedal does not apply pressure any more;

the second step is that: the connecting rod 8 can drive the push rod 1 to move to drive the upper diaphragm 10 to move continuously, at the moment, one end of the upper diaphragm 10 is in contact with the limiting ring groove 15, the upper diaphragm 10 is prevented from being in contact with one side of the vacuum valve 9, a channel between the inner cavity 12 and the outer cavity 13 can be opened, at the moment, air can flow into the vacuum valve 9, the air is led out to the inner part of the lower diaphragm 19 through the air inlet groove 18 in the back of the vacuum valve 9 to continuously apply pressure to the lower diaphragm 19, assistance is achieved, and the piston plate 22 is driven to move to compress brake oil to achieve braking;

the third step: can dismantle fixing bolt 26 through unscrewing fixing bolt 26 when needs are dismantled oilcan 24, alright produce between two mounts 25 at this moment and become flexible can take oilcan 24 down, and then brake oil's change is carried out to oilcan 24's inside, prevents that brake oil life-span from declining and causing the weak of braking effect.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides an automobile brake system vacuum booster, includes initiative push rod (1) etc. its characterized in that: one end of the driving push rod (1) is movably sleeved with a booster pump (2), the left side and the right side of an inner cavity (12) of the booster pump (2) are both provided with a first limiting groove (3), a limiting plate (4) is movably clamped in the first limiting groove (3), one end of the limiting plate (4) is movably sleeved with the driving push rod (1), the left side and the right side of the bottom end of the limit plate (4) are both fixedly provided with limit springs (6), the other end of the limiting spring (6) is fixedly connected with the bottom end of the limiting groove inner cavity (12), a first return spring (5) positioned in the booster pump (2) is movably sleeved on the outer side surface of the driving push rod (1), the upper end and the lower end of the first return spring (5) are respectively fixedly connected with the top end of the inner cavity (12) of the booster pump (2) and the top end of the limiting plate (4), the other end of the driving push rod (1) penetrates through the bottom end of the booster pump (2) and is fixedly provided with a connecting rod (8); the air valve (7) is fixedly sleeved on the outer side face of the connecting rod (8), the vacuum valve (9) is sleeved at the tail end of the connecting rod (8), the upper diaphragm (10) positioned inside the vacuum valve (9) is fixedly sleeved on the outer side face of the connecting rod (8), the limiting ring groove (15) is formed in the bottom end of the inner cavity (12) of the vacuum valve (9), the limiting sleeve (11) is fixedly installed in the middle of the inner cavity (12) of the vacuum valve (9), the inner cavity (12) is formed in the limiting sleeve (11), the outer cavity (13) is formed between the outer side face of the limiting sleeve (11) and the inner cavity (12) of the vacuum valve (9), the inner diameter and the outer diameter of the limiting ring groove (15) are the same as those of the upper diaphragm (10), the air inlet grooves (18) are formed in the bottom end of the vacuum valve (9) at equal angles, the tail end of the connecting rod (8) penetrates through the bottom end of the vacuum, the outer side face of the driven push rod (17) is fixedly sleeved with a rubber plug (16), the bottom of the rubber plug (16) is in contact with the bottom of the vacuum valve (9), the outer side face of the driven push rod (17) is fixedly sleeved with a lower diaphragm (19), the outer side face of the driven push rod (17) is movably sleeved with a third return spring (20), the upper end and the lower end of the third return spring (20) are respectively fixedly connected with the bottom end of the rubber plug (16) and the top end of the lower diaphragm (19), the bottom end of the driven push rod (17) is movably sleeved with an oil cylinder (21), the bottom end of the driven push rod (17) is fixedly provided with a piston plate (22) positioned inside the oil cylinder (21), the diameter of the piston plate (22) is the same as the inner diameter of the oil cylinder (21), the tail end of the oil cylinder (21) is fixedly communicated with an oil pipe (23), and the tail end of the oil pipe, the all fixed mounting in the left and right sides of hydro-cylinder (21) end has mount (25), the equal movable mounting in inside of mount (25) has fixing bolt (26), the medial surface of mount (25) contacts with the lateral surface of oilcan (24).

2. A vehicle brake system vacuum booster as set forth in claim 1, wherein: the left side and the right side of the bottom end of the inner cavity (12) of the vacuum valve (9) are fixedly provided with second return springs (14) located on two sides of the connecting rod (8), and the top ends of the second return springs (14) are fixedly connected with the bottom end of the upper diaphragm (10).

3. A method of operating a vacuum booster for a vehicle brake system according to any one of claims 1-2, characterized by: comprises the following working steps:

the first step is as follows: firstly, an active push rod (1) and a brake pedal in a brake device are fixed, brake oil is filled in an oil can (24), when a driver steps on the brake pedal, the active push rod (1) is driven to move, along with the continuous movement of the active push rod (1), acting force applied to the brake pedal can drive a limiting plate (4) to continuously move, at the moment, the limiting plate (4) can continuously move relative to a limiting groove, a limiting spring (6) and a first reset spring (5) are compressed, and when the brake pedal does not apply pressure any more, the first reset spring (5) and the limiting spring (6) can provide reverse acting force to drive the limiting plate (4) to automatically reset;

the second step is that: the connecting rod (8) can drive the push rod (1) to move to drive the upper diaphragm (10) to move continuously, at the moment, one end of the upper diaphragm (10) is in contact with the limiting ring groove (15), the upper diaphragm (10) is prevented from being in contact with one side of the vacuum valve (9), namely, a channel between the inner cavity (12) and the outer cavity (13) can be opened, air flows into the vacuum valve (9), and is led out to the inner part of the lower diaphragm (19) through the air inlet groove (18) in the back of the vacuum valve (9) to continuously apply pressure to the lower diaphragm (19), so that assistance is completed, and the piston plate (22) is driven to move to compress brake oil to complete braking;

the third step: when needs are dismantled oilcan (24), dismantle fixing bolt (26) through unscrewing fixing bolt (26), produce between two mount (25) at this moment and become flexible and can take off oilcan (24), and then carry out the change of brake oil to the inside of oilcan (24), prevent that the decline of brake oil life-span from causing the weak of braking effect.